(USA TODAY) -- Jen Arnold, star of the hit TLC series The Little Couple, has revealed that she was recently diagnosed with a "rare type of cancer."

The neonatologist, 39, who has had about 30 procedures and surgeries related to her type of dwarfism, and her husband Bill Klein, 38, who runs Rocky and Maggie's Pet Shop in Houston, are parents to son Will, 3, from China, and daughter Zoey, 2, from India.

Arnold tells People.com that she is "currently undergoing treatment, including surgery and chemotherapy."

She adds, "I am very fortunate as the prognosis is good. While there is never a good time to get news like this, getting it just as we are building our new family is tough in many ways ... But being surrounded by the love of my husband and our two beautiful children is actually in many ways giving me the strength to fight it even stronger."

There are no more details available about what type of cancer Arnold is facing.

Fans of the family's TLC reality show, The Little Couple, regularly watch the family's antics, including building their dream home, struggling with fertility and surrogacy issues, and finally expand their family with the adoptions of Will and Zoey.